| abstract |
The invention discloses a lithium secondary battery having an operating voltage ≥ 4.35sV, comprising: a cathode comprising a doped LiCoO active material; an anode comprising graphite; and an electrolyte comprising Carbonate-based solvents, lithium salts, and additives of both succinonitrile (SN) and lithium bis(oxalate)borate (LiBOB) from 100% at 45°C at C/10 rate at 4.5V During discharge from a state of charge (SOC) to an SOC of 0% at 3V, the difference between the SOC at 4.42V and the SOC at 4.35V is at least 7%, but less than 14%, and wherein the active material is subjected to at least 0.5 Any one or more of Mn, Mg, and Ti is doped in mol %. |